Using Windows SDK v7.1 when building in MSBuild (Visual Studio 2010/2010e).

build/common.gypi

 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # IMPORTANT:
 # Please don't directly include this file if you are building via gyp_chromium,
 # since gyp_chromium is automatically forcing its inclusion.
 {
   # Variables expected to be overriden on the GYP command line (-D) or by
   # ~/.gyp/include.gypi.
@@ skipping 823 matching lines @@
           },{
             'msvs_express%': 0,
             'secure_atl%': 1,
           }],
         ],
         'nacl_win64_defines': [
           # This flag is used to minimize dependencies when building
           # Native Client loader for 64-bit Windows.
           'NACL_WIN64',
         ],
+
+        # The desired version of Windows SDK (if different from one used by
+        # default) should be specified in common.gypi.

[Nico, 2012/02/27 18:09:07]

s/common.gypi/include.gypi/, right?

[alexeypa (please no reviews), 2012/02/28 21:03:08]

Yes, indeed.

+        'msbuild_toolset%': '',
       }],
 
       ['os_posix==1 and chromeos==0 and target_arch!="arm"', {
         'use_cups%': 1,
       }, {
         'use_cups%': 0,
       }],
 
       # Set the relative path from this file to the GYP file of the JPEG
       # library used by Chromium.
@@ skipping 172 matching lines @@
           'win_release_RuntimeLibrary%': '2', # 2 = /MT (nondebug DLL)
           'win_debug_RuntimeLibrary%': '3',   # 3 = /MTd (debug DLL)
         }, {
           # See http://msdn.microsoft.com/en-us/library/aa652367.aspx
           'win_release_RuntimeLibrary%': '0', # 0 = /MT (nondebug static)
           'win_debug_RuntimeLibrary%': '1',   # 1 = /MTd (debug static)
         }],
       ],
     },
     'conditions': [
+      ['OS=="win" and "<(msbuild_toolset)"!=""', {
+        'msbuild_toolset': '<(msbuild_toolset)',
+      }],
       ['branding=="Chrome"', {
         'defines': ['GOOGLE_CHROME_BUILD'],
       }, {  # else: branding!="Chrome"
         'defines': ['CHROMIUM_BUILD'],
       }],
       ['component=="shared_library"', {
         'defines': ['COMPONENT_BUILD'],
       }],
       ['component=="shared_library" and incremental_chrome_dll==1', {
         # TODO(dpranke): We can't incrementally link chrome when
@@ skipping 1750 matching lines @@
     # settings in target dicts.  SYMROOT is a special case, because many other
     # Xcode variables depend on it, including variables such as
     # PROJECT_DERIVED_FILE_DIR.  When a source group corresponding to something
     # like PROJECT_DERIVED_FILE_DIR is added to a project, in order for the
     # files to appear (when present) in the UI as actual files and not red
     # red "missing file" proxies, the correct path to PROJECT_DERIVED_FILE_DIR,
     # and therefore SYMROOT, needs to be set at the project level.
     'SYMROOT': '<(DEPTH)/xcodebuild',
   },
 }